kushner



S. KUSHNER.

PNEUMATIC ALARM.

APPLICATION FILED MAY 26, 192i.

1,393,3 2, Patented Oct. 11; 1921.

2 SHEETSSHEET lamvemcoz WWI/EL Sf/I ER Patented Oct. 11, 1921..

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z B E 9 m N 4 a a H m a w M 5% 7 A a, W l 2 5 l l .5 l 44% M w l h 7 Av/ A UNITED STATES SAMUEL K'USHNER, OF NEVI YORK, N. Y.

PNEITMATIC ALARM.

Application filed May 26, 1821.

1 '0 all who it may concern:

Be it known that I, SAMUEL K'UsHNnR, a citizen of the United States,residing at New York in the county of New York and State of blew York,have invented a new and useful Pneumatic Alarm, of which the followingis a specification.

The present invention is a pneumatic alarm and relates particularly toburglar alarms, such as sounding a police whistle.

It is well known that burglars or those which commit unauthorizedtrespass, are more greatly aroused and thrown into excitement by thesounding of a police whistle than by any other means of burglar alarm.Their confusion is excited to the point where they immediately retirefrom their pursuit because it gives the unquestionable and wellrecognized alarm of distress to those in authority.

It is therefore the object of the invention to produce an alarm of theabove type which is automatically and continuously operated and which isof an extremely simple construction" and can be produced and sold at aminimum of cost, the simplicity of the device being of the essence ofthe invention, thereby permitting a device of this nature to be withinthe financial reach of all merchants.

Another object and feature of the invention is that the alarm is givenintermittently in successive blasts in a manner fully simu lating theblowing of the police whistle by a human being.

The invention further resides in the sundry details of construction,combination and arrangement of parts which will appear in the followingdetailed specification.

In this specification and the annexed drawings, the invention isdisclosed in the form in which it is considered to be the best, but theinvention is not limited to such form because it is capable of beingembodied in other forms; and it is to be understood that in and by theclaims following the description herein it is intended to cover theinvention in whatever form it may embody within the scope thereof.

In the accompanying drawings which form a part of the specification itwill be seen that:

Figure 1 is a top plan view of a casing with the top removed,illustrating the whistle blowing and time mechanism,

Fig. 2 is a sectional view taken through Specification of LettersPatent.

Patented Oct. 11, 1921.

Serial No. 472,771.

the casing containing the mechanism shown in Fig. 1 and illustrating thelatter in side elevation, the whistle being connected thereto,

Fig. 3 is a view showing a store or room and the application of theinvention thereto,

Fig. 4 is an enlarged fragmentary sectional view of the whistle timingmeans,

Fig. 5 is a top plan view of the mechanism shown in Fig. l,

Fig. dis a fragmentary side elevation of the timer shown in Fig. 4looking in a direction at right angle to Fig. 4, and

Fig. 7 is a diagrammatic view illustrating the wiring for controllingthe operation of the motor of the alarm.

This mechanism is adapted for use in stores, private houses, offices,etc, where protection is needed day and night. The mechanism consists ofan electrical motor that runs a rotary air compressor directly connectedto a whistle and supplying, when in operation, a constant andcontinuouspressure of air for blowing the whistle, without the use of anintermediate or auxiliary device; This compressorpumps air pressurethrough means whereby it is timed at intervals to correspond to theintermittent blowing of the human breath. The mechanism is, preferably,but not necessarily, closed in a 'suit able box which may be placed inany suitable location in a store, home, etc., (and if used in a storeeither below or above the show-window,) hidden from View. This mechanismis connected by a suitable tubing or air conductor to the outside to apolice or other whistle, likewise obscured from view and protected fromthe elements.

From the box or casing containing the operating mechanism leads electricwiring connected to a suitable source of electric supply, the wiringhaving therein suitable circuit make and break devices which close thecircuit through the motor of the mechanism. "The make and break devicesmay be arranged anywhere in the store or building, to be actuatedautomatically, when a door, window, or show-case is opened, or manuallyby the attendants. These make and break devices are of conventional formand need not be specifically described.

The mechanical and electrical construction is as follows:

A sheet iron box 6 is used to conveniently house the mechanical elementsas shown in Figs. 1, 2 and 3. In this box 6 is contained an electricalrotary motor 7, which by its pulley 8, on the end of the armature shaft,and a'leather belt 9 drives the air rotary compressor or fan blower 10,by means of the blowers pulley 11 on the shaft of the blower. The blower1.0 has an inlet portion 1%, through which the air for compression isreceived, and an outlet 15, through which the air is expelled. Theblower is of standard type and needs no enunciating here. However, it isdeemed advisable to use a funnel-shaped opening 14, at the intake orsuction end of the blower, so as to draw the air in at better advantage.A pipe 16 leading from the outlet 15 is conveniently shaped tocotiperate with the specific timer, shown in Figs. 1, 2, 4:, 5, and 6,and has attached to its outer end a suitable air conductor, which in thepresent showing is the flexible tubing 18 to theouter end of the latterbeing detachablyiconnected the police-whistle 18.

Mounted on the base or bottom of the easing 6 and between the motor 7and compressor 10, is a U-shaped shaft bearingbracket 19, havingjournaled in the ends of its upright arms 20 the transverse timing shaft21. A pulley 12 is fast on one end of the shaft 21 and is arranged toContact with said belt 9 at the point 13, to be driven by the latter.The other end of the shaft 21 carries fast thereon the worm 22.

The pipe 16, in the present embodiment, has a vertically extendingportion 16 in the vicinity of the worm 22, so therefore, at the point30, of'the pipe a suitable support 31 is utilized, to strengthen themechanism. The entire mechanism is firmly'fixed on a base plate32 andmay be put in the box 6, if desired, and attached by rivets or othermeans thereto. The vertical portion 16 of the pipe has a lateral opening27, preferably square, therein. Obviously, when this opening isuncovered any air passing through the pipe 16 escapes before reachingthe whistle 18. In order to open and close the opening 27 at determinedintervals, a sleeve 28 is rotatably' fitted on the portion 16 of thepipe to cover the opening 27. This sleeve has a corresponding opening 29to register with the opening 27 when the sleeve is retated. Thesleeve isrotated by a spiral gear 17 through which the pipe extension 16 extends,said gear rotating on the latter as an axis. The sleeve 28 may either beintegral withthe gear or secured thereto by rivets or other means 28%.The gear 17 is maintained in position by the flange 26 on the pipeextension 16, to mesh with the Worm 22, as clearly shown in Figs. 1,2,4:, and 6. I v

The timing of the shaft 21 is readily permitted, in the presentconstruction and arr-angement, by the replacement of the pulley 12 withone great-er or less diameter, w ereby egulati g the intervals at wh chthe whistle is blown as well as the duration of each blast. The shaft 21may be slidably adjusted, as desired or required, by manipulation of theadjustment collars 2 and 2 1 (Fig. 1). Openings 3?) and 34: are providedso that the blower 10 may receive the air for its purpose in the casing(3. ires 35 are carried from the motor T to the outside through theoutlet 36. This structure is a compact, solid. whole, and eliminates allpossible noise from reaching the exterior.

Fig. 3 shows the mechanism installed in a store of which 3'? is thefloor, the window, 413 a show-case, and -11- the cash window. The box 6is conveniently placed in a corner. as at 38, and the flexible tubing 1is carried through the window so as to be on the outside when it isconnected on whistle 19. It is securely housed in an iron cage 11, so asto prevent possibility of tampering or accident. The machine is thenwired to the make and break switches 45. These are placed, as desired,to be actuated by opening the doors, windows, or may be placed on thefloor where they will he stepped upon, and one is placed conveniently tothe cashier as at -15, e6 being the main or master switch. The wiringdiagram, shown at Fig. 7 is as follows. The current enters at the source50, and is carried through fuse 1-7. to the motor 7, thence to the mainor master switch 16, then to the switches 4-5 connected in parallel, andthence back through the fuse 4:9 to the power source at 50. The switches15 may be of the push button type or any conventional type.

Operation is as follows: The master switch 16 must be closed. Depressingany alarm switch 415, closes the circuit of the motor 7. which by itsbelt 9., runs the pulleys I1 and The blower 10 creates air pressurewhich is carried through the timer to the whistle. The timer aspreviously explained creates intervals of pressure because of its vents27 and 29.

As the two vents 27 and 29 register on each revolution of the gear 17.the air passing through the pipe 16 and its extension 16- is shuntedfrom the whistle. which ceases to sound for the interval. But, as soonas the sleeve 28 covers the vent 27, the air continues in a steadyconstant pressure straight up the tube 16 and passes through thewhistle, thus sounding it. So, therefore. on every revolution, there isan interval that the whistle does not blow. This interval is such thatit represents and simulates the length of time a person would blow, thenstop to inhale and blow again. This action closely resembles, when inoperation, the action of a person and is one of the novel features ofthe invention.

lVhen once placed in operation, the device will blow until th m sterswitch is pulled out. The switches are shown in the present disclosureas having arms 51 and 52 which may be alternately depressed for openingand closing the circuit to the motor 7.

From the foregoing it will be clearly observed that a pneumatic whistlealarm is provided in an economical manner there be ing but few parts,thus insuring durability and the operativeness of the device at alltimes.

Having thus described my invention in the form in which it is at presentdevised, what is claimed as new and novel is: A

1. In a pneumatic whistle, a rotary air compressor, a whistle connectedto the outlet of the compressor, a motor, and an operative connectionbetween said motor and compressor.

2. In a pneumatic whistle, a rotary air compressor, a whistle connectedto the outlet of said compressor, an electric motor, and a drivingconnection between said motor and compressor.

3. In a pneumatic whistle, an air compressor, a pipe leading from theoutlet of said air compressor and having a vent therein intermediate itsends, a whistle connected to the said pipe at a point beyond said vent,a rotary sleeve on said pipe for closing said vent and having an openingtherein to register with the latter during its rotation, whereby thesaid whistle is intermittently sounded, and means for rotating saidsleeve and actuating said compressor.

4:. In a pneumatic whistle, an air compressor, a pipe leading from theoutlet of said compressor and having a vent therein intermediate itsends, a whistle connected to said other end of the pipe, a gear wheel.

for rotating said gear and actuating said compressor.

5. In a pneumatic whistle, an air compressor, a whistle, a connectionbetween the whistle and the outlet of the compressor, said connectionhaving a vent between the whistle and compressor, a rotary sleevesurrounding said connection for closing the vent and having acorresponding opening therein to register with said vent during rotationof the sleeve, a gear radiating from said sleeve, a motor havingconnection with said compressor for actuating the latter, and a shafthaving an operative connection with said gear wheel and actuated by themotor, whereby the sleeve is rotated to cause intermittent sounding ofsaid whistle.

6. In a pneumatic whistle, a base, a rotary air compressor mounted onsaid base, an electric motor mounted on the base, pulleys on the ends ofthe shafts of said motor and compressor, a driving connection betweensaid pulleys, a pipe connected to the outlet of the compressor andhaving a vent therein intermediate its ends, a whistle connected to theother end of the pipe, a rotary sleeve on the pipe for closing said ventand having a corresponding opening therein to register with said ventduring the rotation of the sleeve, a timing shaft having a gearedconnection with said sleeve for rotating the latter, and a means on thetiming shaft to take off power from said driving connection.

7 In a pneumatic whistle as set forth in claim 6, further characterizedby the means on said timing shaft consisting of a pulley or gear wheelbeing removable from the latter and interchangeable with pulleys ofvarying diameter, for the purposes specified. In testimony whereof Ihave hereunto set my hand.

SAMUEL KUSHNER.

